JP2550571B2 - Screen definition library specification control method - Google Patents

Description

Detailed Description [Summary] A screen definition library that holds a screen definition that specifies the configuration of a display screen is specified for each sequentially called application program so that it can be dynamically increased or decreased. It is a control method.

With the command issued by the application program, add the required screen definition library to the linked file of the screen definition library, connect it, and remove it from the file.
Moreover, a means for changing or restoring the library name is provided.

With this method, if each application program of the process that uses the screen definition structure knows only the contents that need to be added to the file by itself and the program to be called directly, it is not necessary to specify all at the beginning, improving the operability of the operator. To do.

[Industrial applications]

The present invention relates to a display process of an information processing system, and particularly, retains a screen definition object that specifies a screen configuration of a display device,
The present invention relates to a control method for improving the operability of specifying a screen definition library.

In the information processing system in which the display content of the display screen is specified by the screen definition including the display configuration information of the standard screen and the screen information including the variable portion and the data, the application program outputs the screen information. Before that, it is necessary to construct a file in which a library holding the screen definition required by the application program is linked so that the desired screen definition can be searched for in each screen display output.

[Conventional technology]

FIG. 3 is a block diagram showing a configuration example of an information processing system.

The processing device 1 is connected to the terminal device 2, and the session control unit 3
Send and receive information by. The terminal device 2 has a display device such as a CRT display device and an input device such as a keyboard.

The session control unit 3 opens a session when the operator of the terminal device 2 inputs a LOGON command, for example.

The operator then enters an ALLOCATE command, such as ALLOCATE FILF (SCRN) DATASET (C, B, A), to request the allocation of the library to use for this session. The library is a library 6 to 8 in an external storage device 4 such as a magnetic disk storage device.
And is managed by the data set name.

The session control unit 3 uses the input ALLOCATE command.
Dataset name C specified in the DATASET parameter,
Connect the B and A libraries, prepare a control table, etc., that can be handled as one file 9 called by the file name SCRN specified in the FILE parameter, and bundle those libraries from the program in the same way as one library. And make it accessible.

Assume that the SCRN file allocated as described above is a file that holds the necessary screen definition program.In that case, the file specified by the ALLOCATE command above is the file specified when searching for the screen definition program. C, B, A
The screen definition library A, which is linked so as to be searched in the order of and is specified last in the command, is a system-specific screen definition library (hereinafter referred to as a system library). The system library A always needs to be specified.

Then, the operator of the terminal designates the name of the application program or the like with a CALL command, for example, and the session control unit 3 activates the designated application program 5.

The application program 5 first requests the open processing unit 10 to execute so-called file open processing, so that the SCRN file previously prepared by the ALLOCATE command can be used in the processing of the application program 5 by the control information. To associate the application program 5 with the SCRN file.

When the screen is displayed on the terminal device 2, the application program 5 requests the screen output unit 11 to output the necessary screen definition name and data.

The screen output unit 11 searches the SCRN file of the screen definition library associated with the application program 5, extracts the specified screen definition, generates the display screen information together with the data, and sends it out via the session control unit 3. , Terminal device 2
To display.

In the terminal device 2, the information input from the keyboard or the like in the input area determined by the screen definition body of the displayed screen is sent to the screen input unit 12 via the session control unit 3, and the screen input unit 12 causes the application program 5 Notify to.

When the required processing is completed in this way, the application program 5 causes the close processing unit 13 to perform a close processing for releasing the association between the SCRN file and the application program 5, and the processing ends.

If it is executed as the application program 5, for example
When the AP-1 program calls another AP-2 program, for example, the AP-2 program is processed by the open processing unit 10 as described in the application program 5 above.
After the association with the SCRN file, the process proceeds, and when the process ends, the close processing unit 13 releases the association, and then the process returns to the execution of the calling AP-1 program. When the AP-2 program calls another AP-3 program, for example, it is the same as the above-mentioned case where AP-1 calls AP-2.

[Problems to be solved by the invention]

As described above, the application program 5 and each program sequentially called from the application program 5 in several steps are DATASET of the ALLOCATE command after the session is opened.
The library file specified by the parameters and linked is used as the library of the screen definition body.

Therefore, the operator of the terminal device 2 must specify all the screen definition library required by the application program 5 and the program called by nesting the application program 5 with the ALLOCATE command before starting the first application program. However, there is a problem that operability is poor for the operator because preparation is required to specify them without omission.

[Means for solving problems]

 FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of the information processing system, 21 is a terminal device 22
And 25 is a processing device that is connected to the storage device 24 to execute processing, and 25 of the processing device 21 is an application program which is being activated and controlled by the session control section 3 or called from another application program, and 30 is an application program. In accordance with the request of 25, the definition file switching unit for switching the screen definition file to a required file and controlling the open and close processing, and 31 connects the screen definition library specified by the definition switching unit 30. A concatenation processing unit that performs processing, and 32 is a concatenation releasing unit that performs processing to release library concatenation.

[Work]

When the definition program switching unit 30 receives from the application program 25 a request for additional processing in which a file name of the screen definition program is specified, it closes any open screen definition program file, and then the application program 25 For startup, add the library allocated with the ALLOCATE command immediately before to the original screen definition file and link it, or if there is no screen definition file, connect the system library and the allocated library. The concatenation processing unit 31 and the open processing unit 10 are controlled so that they are concatenated and the open processing is performed as a file having a designated name.

When the application program 25 ends the process, the definition program switching unit 30 is requested to perform the removal process, and the definition program switching unit 30
After requesting the close processing unit 13 for the screen definition file opened by this application program and closing it, the connection release unit 32 releases the connection of the added library,
Requests to revert to the previous concatenated file and controls to open the original file. In the case of the application program that is started first, the system screen definition library is unassigned and the process ends.

With the control method described above, it becomes possible to dynamically switch the connection structure of the screen definition library files, and it is not necessary to connect all necessary libraries first.

〔Example〕

In FIG. 1, the operator of the terminal device 22 inputs a LOGON command to the session control unit 3 to open a session and requests a library allocation process, as in the conventional case. Enter the ALLOCATE command.

However, according to the present invention, it is only necessary to specify the library of the application program to be started immediately after this.
If one screen is started and the required screen definition library is library B, specify ALLOCATE FILF (BF) DATASET (B) with a command, for example.

The meaning of the parameter of this command is as described above, and therefore the file BF of only the library B designated by the data set name B and stored in the storage device 24 is prepared.

Next, when the AP-1 is started as the application program 25 by the CALL command or the like as in the conventional case, the application program 25 replaces the conventional file opening and performs the additional processing in which the definition name switching unit 30 specifies the file name BF. Make a request.

Below, the flow of processing of the definition switching unit 30 shown in FIG.

The definition program switching unit 30 makes a determination in the processing step 40 in FIG. 2A, and since this is the first additional processing, it requests the concatenation processing unit 31 to specify the specified BF file and system library A. The BF file is concatenated to form the BF file (processing step 41), and then the open processing unit 10 is requested to perform the same open processing as in the related art to associate the BF file with the application program 25 (processing step 42).

After that, the application program 25 is displayed on the screen output unit as before.
Information is exchanged with the terminal device 22 via the 11 and the screen input unit 12 to execute processing, and the screen output unit 11 retrieves and uses the specified screen definition from the file BF of the screen definition as in the conventional case. To do.

When the application program 25 finishes the processing, the definition program switching unit 30 is requested to perform the removal processing designating the BF file instead of the conventional file closing processing.

The definition program switching unit 30 uses the processing step 50 shown in FIG.
Then, after requesting the close processing unit 13 to perform the close processing of the designated BF file, it is judged in the processing step 51, and in this case, the BF file is a file only connecting the system library A and the library B of the application program. Therefore, the connection releasing unit 32 is requested to release the connection, and the allocation of the system library A is released (processing step 5
2, 53).

When the AP-1 program calls another AP-2 program, for example, in the process, the screen definition library (data set name C and Specify) to request allocation
Issue the ALLOCATE command from the calling program (AP-1) and use it as the file name CF used in AP-2,
Then call the AP-2 program.

When the AP-2 program starts executing in the same manner as described by the application program 25, it first requests the definition program switching unit 30 to add a CF file, as described above.

When the definition program switching unit 30 receives a request for additional processing, the definition program switching unit 30 makes a determination in processing step 40 in FIG. 2A, and there is an open screen definition program file BF.
Then, after closing it by the close processing unit 13,
The file CF allocated for starting the application program 25 (AP-2 in this case) is added to the original screen definition file BF and connected, and the connection processing unit 31 makes it a CF file. Request (processing step 44).

Once the additional concatenated CF file is created, the processing step
At 42, the open processing unit 10 executes the open processing.

After that, the application program 25 advances the processing as described above, and when ending the processing, requests the definition program switching unit 30 to perform the removal processing specifying the CF file.

The definition program switching unit 30 requests the close processing unit 13 to perform the close process of the designated CF file in the process step 50 in FIG.
Proceeding to 54, the connection releasing unit 32 requests the open processing unit 10 to release the connection of the added library C and return it to the BF file of the previous connection configuration.
Control to reopen the BF file by.

Then, the called application program AP-2 returns to the calling application program AP-1.

By the above control method, if only the screen definition library of the program to be called immediately after is allocated before the call, the file of the screen definition library can be dynamically switched to the required configuration. Become.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, it is not necessary to specify the screen definition program library of the information processing system so that all the necessary libraries are connected first. There is a significant industrial effect of being improved.

[Brief description of drawings]

 FIG. 1 is a block diagram showing a configuration of the present invention, FIG. 2 is a flow chart of processing of a definition switching unit, and FIG. 3 is a block diagram showing a conventional configuration example. In the figure, 1 and 21 are processing devices, 2 and 22 are terminal devices, 5 and 25 are application programs, 6 to 8 are libraries, 9 is a file, 10 is an open processing unit, 11 is a screen output unit, and 13 is a closing process. Reference numeral 30 is a definition switching unit, 31 is a connection processing unit, 32 is a connection releasing unit, and 40 to 44 and 50 to 55 are processing steps.

Claims (1)

(57) [Claims] 1. An application program, which holds a screen definition body composed of display configuration information of a screen of a display device in a screen definition body library and connects the required screen definition body library to a process for displaying on the screen. In an information processing system configured to search for a specified screen definition object by configuring the following file, the screen definition object assigned to the file having the specified file name in the file existing when the application program is called Means (30, 31) for adding and concatenating a library and changing to the designated file name, and removing the additionally and concatenated screen definition library from the file to restore the file name of the file A screen definition program library designation control method characterized in that means (30, 32) are provided.